819601 has 4 divisors (see below), whose sum is σ = 828900. Its totient is φ = 810304.

The previous prime is 819593. The next prime is 819607. The reversal of 819601 is 106918.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140625 + 678976 = 375^2 + 824^2 .

It is a cyclic number.

It is not a de Polignac number, because 819601 - 2³ = 819593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (819607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4516 + ... + 4693.

It is an arithmetic number, because the mean of its divisors is an integer number (207225).

2⁸¹⁹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

819601 is a deficient number, since it is larger than the sum of its proper divisors (9299).

819601 is an equidigital number, since it uses as much as digits as its factorization.

819601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9298.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 819601 is about 905.3181761127. The cubic root of 819601 is about 93.5838324646.

The spelling of 819601 in words is "eight hundred nineteen thousand, six hundred one".